/*
Tries each handler for the given parameter and returns a success boolean
*/
private boolean parseKV(String key, String value) throws Exception {
boolean success = false;
// must have a registered handler; see registerArgumentHandler()
if (!parameters.containsKey(key)) {
throw new Exception(key + " is not a valid argument");
}
Argument arg = parameters.get(key);
// don't allow dupes
if (arg.getValue() != null) {
throw new Exception("Duplicate arguments: " + key);
}
try {
// handler returns null if it can't handle the argument
// it can throw an exception if the argument is an unacceptable value
Object param = arg.getHandler().tryArgument(value);
if (param != null) {
arg.setValue(param);
success = true;
}
} catch (Exception e) {
throw new Exception("Bad argument value for '" + key + "': " + e.getMessage());
}
return success;
}
